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Contents
- The climate of Monte Rosa
- The best time to visit Monte Rosa
- The worst time to visit Monte Rosa
- Spring weather in Monte Rosa
- Summer weather in Monte Rosa
- Autumn weather in Monte Rosa
- Winter weather in Monte Rosa
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Monte Rosa
Monte Rosa is geographically located in São Tomé and Príncipe, classified under the As or Tropical wet and dry Köppen climate zone, with a predominant savanna ecosystem and significant dry periods during the 'summer months'. Throughout the year, the tropical climate results in temperatures ranging from 23°C (73.4°F) to 28.8°C (83.8°F) and variations in weather conditions including humidity, rainfall, and daylight hours.
In analysing the annual weather parameters, constant daylight of 12.1 hours is observed and average temperatures remain relatively stable—rarely falling below 23°C (73.4°F) or exceeding 28.8°C (83.8°F). Variations exist more significantly when looking at rainfall distribution, humidity levels, and sunshine hours. Rainfall amounts experience tanking from 130mm (5.12") in January to a mere 9mm (0.35") in July, before escalating to peak at around 224mm (8.82") in November. In terms of humidity, it ranges from 76% to 83% across the year with higher percentages during the 'wet season'. Meanwhile, sunshine hours see a decrease from 8.3 hours in January to 5 hours in August, then rebounding back to approximately 8.2 hours by December.
Particular weather patterns draw attention to the high-pressure values recorded from June to August, peaking at approximately 1014.3mb in July and consistent high wind speeds from May to September, racing to a gusty 24.3km/h (15.1mph) in June. Although rainfall is observed in all months, June through to August stand out with significantly less rain, setting it apart as the driest period of the year.
In analysing the annual weather parameters, constant daylight of 12.1 hours is observed and average temperatures remain relatively stable—rarely falling below 23°C (73.4°F) or exceeding 28.8°C (83.8°F). Variations exist more significantly when looking at rainfall distribution, humidity levels, and sunshine hours. Rainfall amounts experience tanking from 130mm (5.12") in January to a mere 9mm (0.35") in July, before escalating to peak at around 224mm (8.82") in November. In terms of humidity, it ranges from 76% to 83% across the year with higher percentages during the 'wet season'. Meanwhile, sunshine hours see a decrease from 8.3 hours in January to 5 hours in August, then rebounding back to approximately 8.2 hours by December.
Particular weather patterns draw attention to the high-pressure values recorded from June to August, peaking at approximately 1014.3mb in July and consistent high wind speeds from May to September, racing to a gusty 24.3km/h (15.1mph) in June. Although rainfall is observed in all months, June through to August stand out with significantly less rain, setting it apart as the driest period of the year.
The best time to visit Monte Rosa
Weather considerations hold paramount importance when planning a visit to Monte Rosa. The ideal time to visit would be during the "dry season", between May to September, with reduced rainfall and cooler temperatures. During this period, rainfall averages from 21mm (0.83") to 22mm (0.87"), complemented by an increased visibility of up to 10km (6.2mi). These months also serve up the more favourable wind conditions, boasting gusts of wind peaking at about 24.3km/h (15.1mph) from May to September. Hence, the pleasant weather combined with fewer rain interruptions make these months the most opportunistic for visiting Monte Rosa.
The worst time to visit Monte Rosa
There also exists less favourable times to visit Monte Rosa. These come about in the "wet season", from October to April, when heavy rainfall and high humidity characterise the weather pattern. November presents the highest levels of rainfall up to 224mm (8.82"), coupled with high humidity at around 81%. Also, sunshine hours decrease significantly, reaching the lower-bound of just 5 hours in August. The combination of these factors makes the period from October to April less appealing for travel.
Spring weather in Monte Rosa
Spring in Monte Rosa, from March to May, experiences a gradual decrease in rainfall which starts at 119mm (4.69") in March to 22mm (0.87") in May. During this period, the average temperatures decrease from 28.8°C (83.8°F) to 25.6°C (78.1°F). About 12.1 hours of daylight is quite constant throughout, accompanied by a slight decline in UV index from 7 in March down to 6 in May.
Summer weather in Monte Rosa
The summer season, from June to August, constitutes the driest part of the year in Monte Rosa. Average temperatures range between 24.5°C (76.1°F) to 24.8°C (76.6°F). As expected, the rainfall decreases significantly from 22mm (0.87") in June to 9mm (0.35") in July, and slightly increases to 21mm (0.83") in August.
Autumn weather in Monte Rosa
Autumn in Monte Rosa, classified from September to November, witnesses a similar trend where temperatures range between 25.5°C (77.9°F) to 27.1°C (80.8°F). However, it brings along an upsurge in rainfall, starting from 35mm (1.38") in September, culminating at a high of 224mm (8.82") in November.
Winter weather in Monte Rosa
With the advent of winter, spanning from December to February, Monte Rosa experiences high rainfall from 159mm (6.26") to 130mm (5.12") in conjunction with average temperatures ranging between 27.5°C (81.5°F) to 28°C (82.4°F). Despite the wet conditions, the area is graced by 12.1 daylight hours throughout and the UV index remains constant at 7 during this period.
Weather in January
January's weather in Monte Rosa, São Tomé and Príncipe, exhibits a moderate increase in warming, starting the year on a mild note compared to the fiscal year's colder months. Notable in this month is the relative humidity at 77%, average high temperature of 28°C (82.4°F), and average low temperature of 27°C (80.6°F). Weather in January »
Weather in February
February in Monte Rosa' weather subtly shifts, showing an increased gust wind speed reaching around 16.5km/h (10.3mph). This increase is slightly visible when compared to January's 15.8km/h (9.8mph), suggesting the prevalence of windy conditions. Weather in February »
Weather in March
March signals the emergence of an increment in rainfall, reaching around 119mm (4.69") in comparison with the previous month's 100mm (3.94"). This indicates the arrival of the monsoon phase in Monte Rosa, marked by a higher frequency of rainfall. Weather in March »
Weather in April
Transitioning into April, Monte Rosa weather conditions are characterized by slight changes, among them, the notable increase in monthly rainfall amounting to 126mm (4.96"). This increase in rainfall slightly overshadows the otherwise constant weather conditions from the previous month. Weather in April »
Weather in May
May's weather in Monte Rosa marks a considerable increase in relative humidity, rising to 79% compared to April's 77%. This coincides with a slightly cooler climate rendered by the elevated rainfall levels that May heralds. The rainfall and increased humidity make the cityscape lush and verdant, enhancing its tropical appeal. Weather in May »
Weather in June
As June unfurls in Monte Rosa, a significant increase in wind speed becomes discernible, reaching around 17.6km/h (10.9mph) when compared to May's 13km/h (8.1mph). The higher wind speeds are brought about by the cooling temperatures. Weather in June »
Weather in July
July sees an encouraging consistency in Monte Rosa's weather conditions, particularly notable is the rise in wind speed to an average gust value of 24.2km/h (15mph), compared to the previous month's 24.3km/h (15.1mph). This enhancement in winds marks a slight relief from the otherwise humid climate. Weather in July »
Weather in August
August's weather in Monte Rosa ushers in a slight rise in average low and high temperatures to 23.2°C (73.8°F) and 24.8°C (76.6°F), respectively. This indicates a continuation of warm conditions paired with a slightly higher humidity profile. Weather in August »
Weather in September
The weather transition in Monte Rosa from September issues in a dip in wind speeds to an average of 16.8km/h (10.4mph), contrasting the higher speeds of the previous gusty month. Nevertheless, this slowdown in wind speeds coincides with a slight warming effect. Weather in September »
Weather in October
As October unfolds in Monte Rosa, a sharp increase in monthly precipitation to 220mm (8.66") from the previous month's 35mm (1.38") becomes quite evident. This large leap signals the onset of the rainy season. This return to a wetter climate transforms the arid landscapes into captivating, lush green vistas. Weather in October »
Weather in November
Bearing November weather in Monte Rosa is a slight decrease in average wind speed, stooping to 12.3km/h (7.6mph) from the preceding month's 14.2km/h (8.8mph). This mild reduction coincides with an ever so slight cooling effect but stays well within the bounds of an overall warm climate. Weather in November »
Weather in December
In Monte Rosa, the December climate witnesses a decrease in rainfall to 159mm (6.26"), still maintaining the humid atmosphere characterizing December's weather. Despite the slight decrease in showers, the weather remains balmy, providing an opportune climate for various activities. Weather in December »
Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How much does it rain in Monte Rosa?
In Monte Rosa, São Tomé and Príncipe, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.
What is the month with the highest UV index in Monte Rosa?
January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index.
What month has the most sunshine in Monte Rosa?
The month with the most sunshine in Monte Rosa is February, with an average of 8.6h of sunshine.
What are the warmest months in Monte Rosa?
March is the month when Monte Rosa, São Tomé and Príncipe, experiences its warmest temperatures, averaging a high of 28.8°C (83.8°F) and a low of 27.5°C (81.5°F).
What is the least humid month in Monte Rosa?
With an average relative humidity of 76%, March is the least humid month in Monte Rosa.
When are the longest days in Monte Rosa?
The month with the longest days in Monte Rosa is June, with an average of 12h and 6min of daylight.
What are the coldest months in Monte Rosa?
Monte Rosa, São Tomé and Príncipe, experiences its lowest temperatures in July, with an average peak of 24.5°C (76.1°F) and a low of 23°C (73.4°F).
What is the driest month in Monte Rosa?
July is the month with the least rainfall. Rain falls for 8.4 days and accumulates 9mm (0.35") of precipitation.
When is the lowest UV index in Monte Rosa?
July is the month with the lowest UV index, with an average maximum UV index of 5.
What is the most humid month in Monte Rosa?
The months with the highest humidity in Monte Rosa, São Tomé and Príncipe, are August through October, with an average relative humidity of 83%.
What is the month with the least sunshine in Monte Rosa?
August has the least sunshine of the year, with an average of 5h of sunshine.
What is the month with the shortest days in Monte Rosa?
October has the shortest days of the year in Monte Rosa, with an average of 12h and 6min of daylight.
What is the rainiest month in Monte Rosa?
November is the month with the most rainfall. Rain falls for 26.7 days and accumulates 224mm (8.82") of precipitation.
Is there Daylight Saving Time (DST) in Monte Rosa?
Monte Rosa does not utilize Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Monte Rosa, São Tomé and Príncipe
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure
Monte Rosa, São Tomé and Príncipe
- Average pressure in January:
1010.7mbar - Average pressure in February:
1009.8mbar - Average pressure in March:
1009.9mbar - Average pressure in April:
1010.1mbar - Average pressure in May:
1011.3mbar - Average pressure in June:
1013.5mbar
- Average pressure in July:
1014.3mbar - Average pressure in August:
1014.1mbar - Average pressure in September:
1013.1mbar - Average pressure in October:
1011.4mbar - Average pressure in November:
1010.4mbar - Average pressure in December:
1010.6mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed
Monte Rosa, São Tomé and Príncipe
- Average wind speed in January:
11.1km/h - Average wind speed in February:
11.6km/h - Average wind speed in March:
11.7km/h - Average wind speed in April:
10.9km/h - Average wind speed in May:
13km/h - Average wind speed in June:
17.6km/h
- Average wind speed in July:
17.7km/h - Average wind speed in August:
17.1km/h - Average wind speed in September:
16.8km/h - Average wind speed in October:
14.2km/h - Average wind speed in November:
12.3km/h - Average wind speed in December:
10.8km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity
Monte Rosa, São Tomé and Príncipe
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall
Monte Rosa, São Tomé and Príncipe
- Average rainfall in January:
130mm - Average rainfall in February:
100mm - Average rainfall in March:
119mm - Average rainfall in April:
126mm - Average rainfall in May:
122mm - Average rainfall in June:
22mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days
Monte Rosa, São Tomé and Príncipe
- Average rainfall days in January:
27.1 days - Average rainfall days in February:
23.4 days - Average rainfall days in March:
24.4 days - Average rainfall days in April:
22 days - Average rainfall days in May:
20.5 days - Average rainfall days in June:
7.3 days
- Average rainfall days in July:
8.4 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
15.8 days - Average rainfall days in October:
24.7 days - Average rainfall days in November:
26.7 days - Average rainfall days in December:
28.6 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight / Average sunshine
Monte Rosa, São Tomé and Príncipe
- Average daylight in January:
12h and 1min - Average daylight in February:
12h and 1min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 1min - Average daylight in May:
12h and 1min - Average daylight in June:
12h and 1min
- Average daylight in July:
12h and 1min - Average daylight in August:
12h and 1min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 1min - Average daylight in November:
12h and 1min - Average daylight in December:
12h and 1min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is October (Average daylight: 12h and 6min).
- Average sunshine in January:
8h and 2min - Average sunshine in February:
8h and 4min - Average sunshine in March:
8h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
7h and 4min - Average sunshine in June:
6h and 2min
- Average sunshine in July:
6h and 0min - Average sunshine in August:
5h and 0min - Average sunshine in September:
5h and 2min - Average sunshine in October:
6h and 4min - Average sunshine in November:
7h and 0min - Average sunshine in December:
8h and 1min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days
Monte Rosa, São Tomé and Príncipe
- Average sunshine days in January:
3.1 days - Average sunshine days in February:
3.8 days - Average sunshine days in March:
5.3 days - Average sunshine days in April:
6.2 days - Average sunshine days in May:
9.2 days - Average sunshine days in June:
16.4 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
8 days - Average sunshine days in September:
5.3 days - Average sunshine days in October:
2.7 days - Average sunshine days in November:
2 days - Average sunshine days in December:
1.5 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index
Monte Rosa, São Tomé and Príncipe
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover
Monte Rosa, São Tomé and Príncipe
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility
Monte Rosa, São Tomé and Príncipe
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
Monte Rosa, São Tomé and Príncipe
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